why do the person white fibres get fatigues a short period?

Dear Student

White muscle fibres appear white due to less amount of myoglobin. These muscle fibres are thick and show fast contraction and are dependent on anaerobic metabolism for energy. White muscle fibres get fatigued soon because of less number of mitochondria and therefore they perform fast and strenuous work for short duration of time.

​​​​​​Significance of white fibres:
  • The white muscle fibre becomes active at high intensity action for short duration.
  • They are known as the fast-twitch muscle.
  • They are active during fast contraction.


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